<template>
  <li>
    <label>
      <input type="checkbox" :checked="todoObj.done" @change="handleCheck(todoObj.id)" />
      <input type="text" :value="todoObj.title" v-show="todoObj.isEdit" @blur="handleBlur(todoObj,$event)" ref="inputTitle" @keypress.enter="handleBlur(todoObj,$event)" />
      <span v-show="!todoObj.isEdit">{{todoObj.title}}</span>
    </label>
    
    <button class="btn btn-danger" @click="handleDelete(todoObj.id)">删除</button>
    <button class="btn btn-edit" @click="handleEdit(todoObj)" v-show="!todoObj.isEdit">编辑</button>
  </li>
</template>

<script>
import pubsub from 'pubsub-js'
export default {
  name: "TodoItem",
  data() {
    return {
      isEdit:false
    };
  },
  //props:['todoObj','changeDone','deleteTodo'],
  props:['todoObj'],
  methods:{
    handleCheck(id){
      console.log(id);
      //this.changeDone(id);
      this.$bus.$emit('changeDone',id);
    },
    handleDelete(id){
      console.log(id);
      //this.deleteTodo(id);
      //this.$bus.$emit('deleteTodo',id);//全局消息总线
      pubsub.publish('deleteTodo',id);//发布消息
    },
    handleEdit(todo) {
      let key = 'isEdit';
      if(Object.prototype.hasOwnProperty.call(todo, key)){
        todo.isEdit = true;
      }else{
        this.$set(todo,'isEdit',true);
      }
      this.$nextTick(()=>{
        this.$refs.inputTitle.focus();
      });      
    },
    handleBlur(todo,e){
      if(''===e.target.value.trim()){
        return;
      }
      todo.isEdit = false;
      this.$bus.$emit('updateTodo',todo.id,e.target.value);
    }
  },
  mounted(){
    
  },
  beforeDestroy(){

  }
};
</script>

<style scoped>
li {
  list-style: none;
  height: 36px;
  line-height: 36px;
  padding: 0 5px;
  border-bottom: 1px solid #ddd;
}

li label {
  float: left;
  cursor: pointer;
}
li label li input {
  vertical-align: middle;
  margin-right: 6px;
  position: relative;
  top: -1px;
}
li button {
  float: right;
  margin-top: 3px;
  display: none;
}
li:before {
  content: initial;
}
li:last-child {
  border-bottom: none;
}
li:hover{
  background: #ddd;
}
li:hover button{
  display: block;
}
</style>>